factor out common run code from se.py and fs.py.

configs/example/fs.py:
    factor out common code.
configs/example/se.py:
    factor out common code

--HG--
extra : convert_revision : 72a1f653c84eae1b7d281e0a5e60ee116ad6b27d

5 files changed, 299 insertions, 346 deletions

diff --git a/configs/common/Caches.py b/configs/common/Caches.py
new file mode 100644
index 000000000..d86fba246
--- /dev/null
+++ b/configs/common/Caches.py
@@ -0,0 +1,39 @@
+# Copyright (c) 2006 The Regents of The University of Michigan
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Lisa Hsu
+
+import m5
+from m5.objects import *
+
+class L1Cache(BaseCache):
+    assoc = 2
+    block_size = 64
+    latency = 1
+    mshrs = 10
+    tgts_per_mshr = 5
+    protocol = CoherenceProtocol(protocol='moesi')
+
diff --git a/configs/common/Options.py b/configs/common/Options.py
new file mode 100644
index 000000000..d9c1cc64e
--- /dev/null
+++ b/configs/common/Options.py
@@ -0,0 +1,57 @@
+# Copyright (c) 2006 The Regents of The University of Michigan
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Lisa Hsu
+
+# system options
+parser.add_option("-d", "--detailed", action="store_true")
+parser.add_option("-t", "--timing", action="store_true")
+parser.add_option("-n", "--num_cpus", type="int", default=1)
+parser.add_option("--caches", action="store_true")
+
+# Run duration options
+parser.add_option("-m", "--maxtick", type="int")
+parser.add_option("--maxtime", type="float")
+
+# Checkpointing options
+###Note that performing checkpointing via python script files will override
+###checkpoint instructions built into binaries.
+parser.add_option("--take_checkpoints", action="store", type="string",
+                  help="<M,N> will take checkpoint at cycle M and every N cycles \
+                  thereafter")
+parser.add_option("--max_checkpoints", action="store", type="int",
+                  help="the maximum number of checkpoints to drop",
+                  default=5)
+parser.add_option("--checkpoint_dir", action="store", type="string",
+                  help="Place all checkpoints in this absolute directory")
+parser.add_option("-r", "--checkpoint_restore", action="store", type="int",
+                  help="restore from checkpoint <N>")
+
+# CPU Switching - default switch model goes from a checkpoint
+# to a timing simple CPU with caches to warm up, then to detailed CPU for
+# data measurement
+parser.add_option("-s", "--standard_switch", action="store_true",
+                  help="switch from one cpu mode to another")
diff --git a/configs/common/Simulation.py b/configs/common/Simulation.py
new file mode 100644
index 000000000..b927315ba
--- /dev/null
+++ b/configs/common/Simulation.py
@@ -0,0 +1,175 @@
+# Copyright (c) 2006 The Regents of The University of Michigan
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Lisa Hsu
+
+from os import getcwd
+import m5
+from m5.objects import *
+m5.AddToPath('../common')
+from Caches import *
+
+def run(options, root, testsys):
+    if options.maxtick:
+        maxtick = options.maxtick
+    elif options.maxtime:
+        simtime = int(options.maxtime * root.clock.value)
+        print "simulating for: ", simtime
+        maxtick = simtime
+    else:
+        maxtick = -1
+
+    if options.checkpoint_dir:
+        cptdir = options.checkpoint_dir
+    else:
+        cptdir = getcwd()
+
+    np = options.num_cpus
+    max_checkpoints = options.max_checkpoints
+
+    if options.standard_switch:
+        switch_cpus = [TimingSimpleCPU(defer_registration=True, cpu_id=(np+i))
+                       for i in xrange(np)]
+        switch_cpus1 = [DerivO3CPU(defer_registration=True, cpu_id=(2*np+i))
+                        for i in xrange(np)]
+        for i in xrange(np):
+            switch_cpus[i].system =  testsys
+            switch_cpus1[i].system =  testsys
+            if not m5.build_env['FULL_SYSTEM']:
+                switch_cpus[i].workload = testsys.cpu[i].workload
+                switch_cpus1[i].workload = testsys.cpu[i].workload
+            switch_cpus[i].clock = testsys.cpu[0].clock
+            switch_cpus1[i].clock = testsys.cpu[0].clock
+            if options.caches:
+                switch_cpus[i].addPrivateSplitL1Caches(L1Cache(size = '32kB'),
+                                                       L1Cache(size = '64kB'))
+
+            switch_cpus[i].mem = testsys.physmem
+            switch_cpus1[i].mem = testsys.physmem
+            switch_cpus[i].connectMemPorts(testsys.membus)
+            root.switch_cpus = switch_cpus
+            root.switch_cpus1 = switch_cpus1
+            switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)]
+            switch_cpu_list1 = [(switch_cpus[i], switch_cpus1[i]) for i in xrange(np)]
+
+    m5.instantiate(root)
+
+    if options.checkpoint_restore:
+        from os.path import isdir
+        from os import listdir
+        import re
+
+        if not isdir(cptdir):
+            m5.panic("checkpoint dir %s does not exist!" % cptdir)
+
+        dirs = listdir(cptdir)
+        expr = re.compile('cpt.([0-9]*)')
+        cpts = []
+        for dir in dirs:
+            match = expr.match(dir)
+            if match:
+                cpts.append(match.group(1))
+
+        cpts.sort(lambda a,b: cmp(long(a), long(b)))
+
+        cpt_num = options.checkpoint_restore
+
+        if cpt_num > len(cpts):
+            m5.panic('Checkpoint %d not found' % cpt_num)
+
+        m5.restoreCheckpoint(root,
+                             "/".join([cptdir, "cpt.%s" % cpts[cpt_num - 1]]))
+
+    if options.standard_switch:
+        exit_event = m5.simulate(10000)
+
+        ## when you change to Timing (or Atomic), you halt the system given
+        ## as argument.  When you are finished with the system changes
+        ## (including switchCpus), you must resume the system manually.
+        ## You DON'T need to resume after just switching CPUs if you haven't
+        ## changed anything on the system level.
+
+        m5.changeToTiming(testsys)
+        m5.switchCpus(switch_cpu_list)
+        m5.resume(testsys)
+
+        exit_event = m5.simulate(3000000)
+        m5.switchCpus(switch_cpu_list1)
+
+    num_checkpoints = 0
+    exit_cause = ''
+
+    if options.take_checkpoints:
+        [when, period] = options.take_checkpoints.split(",", 1)
+        when = int(when)
+        period = int(period)
+
+        print "when is ", when, " period is ", period
+        exit_event = m5.simulate(when)
+        while exit_event.getCause() == "checkpoint":
+            exit_event = m5.simulate(when - m5.curTick())
+
+        if exit_event.getCause() == "simulate() limit reached":
+            m5.checkpoint(root, cptdir + "cpt.%d")
+            num_checkpoints += 1
+
+        sim_ticks = when
+        exit_cause = "maximum %d checkpoints dropped" % max_checkpoints
+        while num_checkpoints < max_checkpoints:
+            if (sim_ticks + period) > maxtick and maxtick != -1:
+                exit_event = m5.simulate(maxtick - sim_ticks)
+                exit_cause = exit_event.getCause()
+                break
+            else:
+                exit_event = m5.simulate(period)
+                sim_ticks += period
+                while exit_event.getCause() == "checkpoint":
+                    exit_event = m5.simulate(sim_ticks - m5.curTick())
+                if exit_event.getCause() == "simulate() limit reached":
+                    m5.checkpoint(root, cptdir + "cpt.%d")
+                    num_checkpoints += 1
+
+    else: #no checkpoints being taken via this script
+        exit_event = m5.simulate(maxtick)
+
+        while exit_event.getCause() == "checkpoint":
+            m5.checkpoint(root, cptdir + "cpt.%d")
+            num_checkpoints += 1
+            if num_checkpoints == max_checkpoints:
+                exit_cause =  "maximum %d checkpoints dropped" % max_checkpoints
+                break
+
+            if maxtick == -1:
+                exit_event = m5.simulate(maxtick)
+            else:
+                exit_event = m5.simulate(maxtick - m5.curTick())
+
+            exit_cause = exit_event.getCause()
+
+    if exit_cause == '':
+        exit_cause = exit_event.getCause()
+    print 'Exiting @ cycle', m5.curTick(), 'because ', exit_cause
+
diff --git a/configs/example/fs.py b/configs/example/fs.py
index a9daf63be..ec3be835a 100644
--- a/configs/example/fs.py
+++ b/configs/example/fs.py
@@ -34,6 +34,7 @@ m5.AddToPath('../common')
 from FSConfig import *
 from SysPaths import *
 from Benchmarks import *
+import Simulation
 
 if not m5.build_env['FULL_SYSTEM']:
     m5.panic("This script requires full-system mode (ALPHA_FS).")
@@ -48,40 +49,13 @@ parser.add_option("-b", "--benchmark", action="store", type="string",
                   help="Specify the benchmark to run. Available benchmarks: %s"\
                   % DefinedBenchmarks)
 
-# system options
-parser.add_option("-d", "--detailed", action="store_true")
-parser.add_option("-t", "--timing", action="store_true")
-parser.add_option("-n", "--num_cpus", type="int", default=1)
-parser.add_option("--caches", action="store_true")
-
-# Run duration options
-parser.add_option("-m", "--maxtick", type="int")
-parser.add_option("--maxtime", type="float")
-
 # Metafile options
 parser.add_option("--etherdump", action="store", type="string", dest="etherdump",
                   help="Specify the filename to dump a pcap capture of the" \
                   "ethernet traffic")
 
-# Checkpointing options
-###Note that performing checkpointing via python script files will override
-###checkpoint instructions built into binaries.
-parser.add_option("--take_checkpoints", action="store", type="string",
-                  help="<M,N> will take checkpoint at cycle M and every N cycles \
-                  thereafter")
-parser.add_option("--max_checkpoints", action="store", type="int",
-                  help="the maximum number of checkpoints to drop",
-                  default=5)
-parser.add_option("--checkpoint_dir", action="store", type="string",
-                  help="Place all checkpoints in this absolute directory")
-parser.add_option("-r", "--checkpoint_restore", action="store", type="int",
-                  help="restore from checkpoint <N>")
 
-# CPU Switching - default switch model goes from a checkpoint
-# to a timing simple CPU with caches to warm up, then to detailed CPU for
-# data measurement
-parser.add_option("-s", "--standard_switch", action="store_true",
-                  help="switch from one cpu mode to another")
+execfile("Options.py")
 
 (options, args) = parser.parse_args()
 
@@ -89,14 +63,6 @@ if args:
     print "Error: script doesn't take any positional arguments"
     sys.exit(1)
 
-class MyCache(BaseCache):
-    assoc = 2
-    block_size = 64
-    latency = 1
-    mshrs = 10
-    tgts_per_mshr = 5
-    protocol = CoherenceProtocol(protocol='moesi')
-
 # driver system CPU is always simple... note this is an assignment of
 # a class, not an instance.
 DriveCPUClass = AtomicSimpleCPU
@@ -134,8 +100,8 @@ np = options.num_cpus
 test_sys.cpu = [TestCPUClass(cpu_id=i) for i in xrange(np)]
 for i in xrange(np):
     if options.caches and not options.standard_switch:
-        test_sys.cpu[i].addPrivateSplitL1Caches(MyCache(size = '32kB'),
-                                                  MyCache(size = '64kB'))
+        test_sys.cpu[i].addPrivateSplitL1Caches(L1Cache(size = '32kB'),
+                                                L2Cache(size = '64kB'))
     test_sys.cpu[i].connectMemPorts(test_sys.membus)
     test_sys.cpu[i].mem = test_sys.physmem
 
@@ -151,129 +117,4 @@ else:
     print "Error I don't know how to create more than 2 systems."
     sys.exit(1)
 
-if options.standard_switch:
-    switch_cpus = [TimingSimpleCPU(defer_registration=True, cpu_id=(np+i) for i in xrange(np))]
-    switch_cpus1 = [DerivO3CPU(defer_registration=True, cpu_id=(2*np+i) for i in xrange(np))]
-    for i in xrange(np):
-        switch_cpus[i].system =  test_sys
-        switch_cpus1[i].system =  test_sys
-        switch_cpus[i].clock = TestCPUClass.clock
-        switch_cpus1[i].clock = TestCPUClass.clock
-        if options.caches:
-            switch_cpus[i].addPrivateSplitL1Caches(MyCache(size = '32kB'),
-                                                    MyCache(size = '64kB'))
-
-        switch_cpus[i].mem = test_sys.physmem
-        switch_cpus1[i].mem = test_sys.physmem
-        switch_cpus[i].connectMemPorts(test_sys.membus)
-        root.switch_cpus = switch_cpus
-        root.switch_cpus1 = switch_cpus1
-        switch_cpu_list = [(test_sys.cpu[i], switch_cpus[i]) for i in xrange(np)]
-        switch_cpu_list1 = [(switch_cpus[i], switch_cpus1[i]) for i in xrange(np)]
-
-m5.instantiate(root)
-
-if options.checkpoint_dir:
-    cptdir = options.checkpoint_dir
-else:
-    cptdir = getcwd()
-
-if options.checkpoint_restore:
-    from os.path import isdir
-    from os import listdir, getcwd
-    import re
-
-    if not isdir(cptdir):
-        m5.panic("checkpoint dir %s does not exist!" % cptdir)
-
-    dirs = listdir(cptdir)
-    expr = re.compile('cpt.([0-9]*)')
-    cpts = []
-    for dir in dirs:
-        match = expr.match(dir)
-        if match:
-            cpts.append(match.group(1))
-
-    cpts.sort(lambda a,b: cmp(long(a), long(b)))
-
-    if options.checkpoint_restore > len(cpts):
-        m5.panic('Checkpoint %d not found' % options.checkpoint_restore)
-
-    m5.restoreCheckpoint(root, "/".join([cptdir, "cpt.%s" % cpts[options.checkpoint_restore - 1]]))
-
-if options.standard_switch:
-    exit_event = m5.simulate(1000)
-    ## when you change to Timing (or Atomic), you halt the system given
-    ## as argument.  When you are finished with the system changes
-    ## (including switchCpus), you must resume the system manually.
-    ## You DON'T need to resume after just switching CPUs if you haven't
-    ## changed anything on the system level.
-    m5.changeToTiming(test_sys)
-    m5.switchCpus(switch_cpu_list)
-    m5.resume(test_sys)
-
-    exit_event = m5.simulate(500000000000)
-    m5.switchCpus(switch_cpu_list1)
-
-if options.maxtick:
-    maxtick = options.maxtick
-elif options.maxtime:
-    simtime = int(options.maxtime * root.clock.value)
-    print "simulating for: ", simtime
-    maxtick = simtime
-else:
-    maxtick = -1
-
-num_checkpoints = 0
-
-exit_cause = ''
-
-if options.take_checkpoints:
-    [when, period] = options.take_checkpoints.split(",", 1)
-    when = int(when)
-    period = int(period)
-
-    exit_event = m5.simulate(when)
-    while exit_event.getCause() == "checkpoint":
-        exit_event = m5.simulate(when - m5.curTick())
-
-    if exit_event.getCause() == "simulate() limit reached":
-        m5.checkpoint(root, cptdir + "cpt.%d")
-        num_checkpoints += 1
-
-    sim_ticks = when
-    exit_cause = "maximum %d checkpoints dropped" % options.max_checkpoints
-    while num_checkpoints < options.max_checkpoints:
-        if (sim_ticks + period) > maxtick and maxtick != -1:
-            exit_event = m5.simulate(maxtick - sim_ticks)
-            exit_cause = exit_event.getCause()
-            break
-        else:
-            exit_event = m5.simulate(period)
-            sim_ticks += period
-            while exit_event.getCause() == "checkpoint":
-                exit_event = m5.simulate(period - m5.curTick())
-            if exit_event.getCause() == "simulate() limit reached":
-                m5.checkpoint(root, cptdir + "cpt.%d")
-                num_checkpoints += 1
-
-else: #no checkpoints being taken via this script
-    exit_event = m5.simulate(maxtick)
-
-    while exit_event.getCause() == "checkpoint":
-        m5.checkpoint(root, cptdir + "cpt.%d")
-        num_checkpoints += 1
-        if num_checkpoints == options.max_checkpoints:
-            exit_cause =  "maximum %d checkpoints dropped" % options.max_checkpoints
-            break
-
-        if maxtick == -1:
-            exit_event = m5.simulate(maxtick)
-        else:
-            exit_event = m5.simulate(maxtick - m5.curTick())
-
-        exit_cause = exit_event.getCause()
-
-if exit_cause == '':
-    exit_cause = exit_event.getCause()
-print 'Exiting @ cycle', m5.curTick(), 'because ', exit_cause
+Simulation.run(options, root, test_sys)
diff --git a/configs/example/se.py b/configs/example/se.py
index 2e63e27da..e4fe93294 100644
--- a/configs/example/se.py
+++ b/configs/example/se.py
@@ -34,6 +34,7 @@ import m5
 from m5.objects import *
 import os, optparse, sys
 m5.AddToPath('../common')
+import Simulation
 
 parser = optparse.OptionParser()
 
@@ -47,34 +48,7 @@ parser.add_option("-o", "--options", default="",
 parser.add_option("-i", "--input", default="",
                   help="A file of input to give to the binary.")
 
-# System options
-parser.add_option("-d", "--detailed", action="store_true")
-parser.add_option("-t", "--timing", action="store_true")
-parser.add_option("--caches", action="store_true")
-
-# Run duration options
-parser.add_option("-m", "--maxtick", type="int")
-parser.add_option("--maxtime", type="float")
-
-#Checkpointing options
-###Note that performing checkpointing via python script files will override
-###checkpoint instructions built into binaries.
-parser.add_option("--take_checkpoints", action="store", type="string",
-                  help="<M,N> will take checkpoint at cycle M and every N cycles \
-                  thereafter")
-parser.add_option("--max_checkpoints", action="store", type="int",
-                  help="the maximum number of checkpoints to drop",
-                  default=5)
-parser.add_option("--checkpoint_dir", action="store", type="string",
-                  help="Place all checkpoints in this absolute directory")
-parser.add_option("-r", "--checkpoint_restore", action="store", type="int",
-                  help="restore from checkpoint <N>")
-
-#CPU Switching - default switch model generally goes from a checkpoint
-#to a timing simple CPU with caches to warm up, then to detailed CPU for
-#data measurement
-parser.add_option("-s", "--standard_switch", action="store_true",
-                  help="switch from one cpu mode to another")
+execfile("Options.py")
 
 (options, args) = parser.parse_args()
 
@@ -82,13 +56,6 @@ if args:
     print "Error: script doesn't take any positional arguments"
     sys.exit(1)
 
-class MyCache(BaseCache):
-    assoc = 2
-    block_size = 64
-    latency = 1
-    mshrs = 10
-    tgts_per_mshr = 5
-
 process = LiveProcess()
 process.executable = options.cmd
 process.cmd = options.cmd + " " + options.options
@@ -117,159 +84,33 @@ if options.detailed:
 
 
 if options.timing:
-    cpu = TimingSimpleCPU()
+    CPUClass = TimingSimpleCPU
+    test_mem_mode = 'timing'
 elif options.detailed:
-    cpu = DerivO3CPU()
-else:
-    cpu = AtomicSimpleCPU()
-
-cpu.workload = process
-cpu.cpu_id = 0
-
-system = System(cpu = cpu,
-                physmem = PhysicalMemory(range=AddrRange("512MB")),
-                membus = Bus())
-system.physmem.port = system.membus.port
-system.cpu.connectMemPorts(system.membus)
-system.cpu.mem = system.physmem
-system.cpu.clock = '2GHz'
-if options.caches and not options.standard_switch:
-    system.cpu.addPrivateSplitL1Caches(MyCache(size = '32kB'),
-                                       MyCache(size = '64kB'))
-
-root = Root(system = system)
-
-if options.timing or options.detailed:
-    root.system.mem_mode = 'timing'
-
-if options.standard_switch:
-    switch_cpu = TimingSimpleCPU(defer_registration=True, cpu_id=1)
-    switch_cpu1 = DerivO3CPU(defer_registration=True, cpu_id=2)
-    switch_cpu.system =  system
-    switch_cpu1.system =  system
-    switch_cpu.clock = cpu.clock
-    switch_cpu1.clock = cpu.clock
-    if options.caches:
-        switch_cpu.addPrivateSplitL1Caches(MyCache(size = '32kB'),
-                                           MyCache(size = '64kB'))
-
-    switch_cpu.workload = process
-    switch_cpu1.workload = process
-    switch_cpu.mem = system.physmem
-    switch_cpu1.mem = system.physmem
-    switch_cpu.connectMemPorts(system.membus)
-    root.switch_cpu = switch_cpu
-    root.switch_cpu1 = switch_cpu1
-    switch_cpu_list = [(system.cpu, switch_cpu)]
-    switch_cpu_list1 = [(switch_cpu, switch_cpu1)]
-
-# instantiate configuration
-m5.instantiate(root)
-
-if options.checkpoint_dir:
-    cptdir = options.checkpoint_dir
+    CPUClass = DerivO3CPU
+    test_mem_mode = 'timing'
 else:
-    cptdir = getcwd()
-
-if options.checkpoint_restore:
-    from os.path import isdir
-    from os import listdir, getcwd
-    import re
-
-    if not isdir(cptdir):
-        m5.panic("checkpoint dir %s does not exist!" % cptdir)
+    CPUClass = AtomicSimpleCPU
+    test_mem_mode = 'atomic'
 
-    dirs = listdir(cptdir)
-    expr = re.compile('cpt.([0-9]*)')
-    cpts = []
-    for dir in dirs:
-        match = expr.match(dir)
-        if match:
-            cpts.append(match.group(1))
+CPUClass.clock = '2GHz'
 
-    cpts.sort(lambda a,b: cmp(long(a), long(b)))
+np = options.num_cpus
 
-    if options.checkpoint_restore > len(cpts):
-        m5.panic('Checkpoint %d not found' % options.checkpoint_restore)
-
-    print "restoring checkpoint from ","/".join([cptdir, "cpt.%s" % cpts[options.checkpoint_restore - 1]])
-    m5.restoreCheckpoint(root, "/".join([cptdir, "cpt.%s" % cpts[options.checkpoint_restore - 1]]))
-
-if options.standard_switch:
-    exit_event = m5.simulate(10000)
-    ## when you change to Timing (or Atomic), you halt the system given
-    ## as argument.  When you are finished with the system changes
-    ## (including switchCpus), you must resume the system manually.
-    ## You DON'T need to resume after just switching CPUs if you haven't
-    ## changed anything on the system level.
-    m5.changeToTiming(system)
-    m5.switchCpus(switch_cpu_list)
-    m5.resume(system)
-
-    exit_event = m5.simulate(500000000000)
-    m5.switchCpus(switch_cpu_list1)
-
-if options.maxtick:
-    maxtick = options.maxtick
-elif options.maxtime:
-    simtime = int(options.maxtime * root.clock.value)
-    print "simulating for: ", simtime
-    maxtick = simtime
-else:
-    maxtick = -1
-
-num_checkpoints = 0
-
-exit_cause = ''
-
-if options.take_checkpoints:
-    [when, period] = options.take_checkpoints.split(",", 1)
-    when = int(when)
-    period = int(period)
-
-    exit_event = m5.simulate(when)
-    while exit_event.getCause() == "checkpoint":
-        exit_event = m5.simulate(when - m5.curTick())
-
-    if exit_event.getCause() == "simulate() limit reached":
-        m5.checkpoint(root, cptdir + "cpt.%d")
-        num_checkpoints += 1
-
-    sim_ticks = when
-    exit_cause = "maximum %d checkpoints dropped" % options.max_checkpoints
-    while num_checkpoints < options.max_checkpoints:
-        if (sim_ticks + period) > maxtick and maxtick != -1:
-            exit_event = m5.simulate(maxtick - sim_ticks)
-            exit_cause = exit_event.getCause()
-            break
-        else:
-            exit_event = m5.simulate(period)
-            sim_ticks += period
-            while exit_event.getCause() == "checkpoint":
-                exit_event = m5.simulate(period - m5.curTick())
-            if exit_event.getCause() == "simulate() limit reached":
-                m5.checkpoint(root, cptdir + "cpt.%d")
-                num_checkpoints += 1
-
-else: #no checkpoints being taken via this script
-    exit_event = m5.simulate(maxtick)
-
-    while exit_event.getCause() == "checkpoint":
-        m5.checkpoint(root, cptdir + "cpt.%d")
-        num_checkpoints += 1
-        if num_checkpoints == options.max_checkpoints:
-            exit_cause =  "maximum %d checkpoints dropped" % options.max_checkpoints
-            break
-
-        if maxtick == -1:
-            exit_event = m5.simulate(maxtick)
-        else:
-            exit_event = m5.simulate(maxtick - m5.curTick())
+system = System(cpu = [CPUClass(cpu_id=i) for i in xrange(np)],
+                physmem = PhysicalMemory(range=AddrRange("512MB")),
+                membus = Bus(), mem_mode = test_mem_mode)
 
-        exit_cause = exit_event.getCause()
+system.physmem.port = system.membus.port
 
-if exit_cause == '':
-    exit_cause = exit_event.getCause()
-print 'Exiting @ cycle', m5.curTick(), 'because ', exit_cause
+for i in xrange(np):
+    if options.caches and not options.standard_switch:
+        system.cpu[i].addPrivateSplitL1Caches(L1Cache(size = '32kB'),
+                                              L2Cache(size = '64kB'))
+    system.cpu[i].connectMemPorts(system.membus)
+    system.cpu[i].mem = system.physmem
+    system.cpu[i].workload = process
 
+root = Root(system = system)
 
+Simulation.run(options, root, system)